CVE-2026-23743 Discourse allows permalinks to restricted resources to leak resource slugs to unauthorized users

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, permalinks pointing to access-restricted resources private topics, categories, posts, or hidden tags were redirecting users to URLs containing the resource slug, even when the user...

CVE-2026-23743

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, permalinks pointing to access-restricted resources private topics, categories, posts, or hidden tags were redirecting users to URLs containing the resource slug, even when the user...

CVE-2026-23743

Summary of CVE-2026-23743 (Discourse) : Prior to versions 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, permalinks to access-restricted resources (private topics/categories/posts/hidden tags) could redirect to URLs containing the resource slug in the Location header or 404 search box, leaking potent...

EUVD-2026-4874

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, moderators can convert some personal messages to public topics when they shouldn't have access. This issue is patched in versions 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0. As a...

CVE-2026-21865 Discourse topic conversion permission vulnerability for moderators

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, moderators can convert some personal messages to public topics when they shouldn't have access. This issue is patched in versions 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0. As a...

CVE-2025-69218

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, moderators can access the topuploads admin report which should be restricted to admins only. This report displays direct URLs to all uploaded files on the site, including sensitive...

CVE-2025-69218 Discourse moderators can access admin-only reports exposing private upload URLs

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, moderators can access the topuploads admin report which should be restricted to admins only. This report displays direct URLs to all uploaded files on the site, including sensitive...

CVE-2025-69218

Discourse vulnerability CVE-2025-69218: In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, moderators can access the private top_uploads admin report, which reveals direct URLs to all uploaded files (including potential sensitive content like user data exports and admin backups). The...

CVE-2025-69218 Discourse moderators can access admin-only reports exposing private upload URLs

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, moderators can access the topuploads admin report which should be restricted to admins only. This report displays direct URLs to all uploaded files on the site, including sensitive...

CVE-2025-69218 Discourse moderators can access admin-only reports exposing private upload URLs

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, moderators can access the topuploads admin report which should be restricted to admins only. This report displays direct URLs to all uploaded files on the site, including sensitive...

CVE-2025-68933 Discourse non-admin moderators can exfiltrate private content via post ownership transfer

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, non-admin moderators with the moderatorschangepostownership setting enabled can change ownership of posts in private messages and restricted categories they cannot access, then export...

CVE-2025-68933 Discourse non-admin moderators can exfiltrate private content via post ownership transfer

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, non-admin moderators with the moderatorschangepostownership setting enabled can change ownership of posts in private messages and restricted categories they cannot access, then export...

CVE-2025-68933

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, non-admin moderators with the moderatorschangepostownership setting enabled can change ownership of posts in private messages and restricted categories they cannot access, then export...

CVE-2025-68933

CVE-2025-68933 (Discourse) is a broken access control vulnerability affecting Discourse versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0. Non-admin moderators with the moderators_change_post_ownership setting enabled can change ownership of posts in private messages and restricted cate...

EUVD-2025-206428

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, non-admin moderators with the moderatorschangepostownership setting enabled can change ownership of posts in private messages and restricted categories they cannot access, then export...

CVE-2025-68933 Discourse non-admin moderators can exfiltrate private content via post ownership transfer

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, non-admin moderators with the moderatorschangepostownership setting enabled can change ownership of posts in private messages and restricted categories they cannot access, then export...

CVE-2025-68666 Discourse users archives leaked to users with moderation privileges

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, users archives are viewable by users with moderation privileges even though moderators should not have access to the archives. Private topic/post content made by the users are leaked...

CVE-2025-68666 Discourse users archives leaked to users with moderation privileges

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, users archives are viewable by users with moderation privileges even though moderators should not have access to the archives. Private topic/post content made by the users are leaked...

CVE-2025-68666 Discourse users archives leaked to users with moderation privileges

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, users archives are viewable by users with moderation privileges even though moderators should not have access to the archives. Private topic/post content made by the users are leaked...

EUVD-2025-206423

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, users archives are viewable by users with moderation privileges even though moderators should not have access to the archives. Private topic/post content made by the users are leaked...